Re: [PATCH v6 05/11] virtio-gpu: Introduce virgl_gpu_resource structure

[Marc-André Lureau <marcandre.lureau@xxxxxxxxx>]

Hi

On Tue, Dec 19, 2023 at 11:55 AM Huang Rui <ray.huang@xxxxxxx> wrote:
>
> Introduce a new virgl_gpu_resource data structure and helper functions
> for virgl. It's used to add new member which is specific for virgl in
> following patches of blob memory support.
>
> Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
> ---
>
> New patch:
> - Introduce new struct virgl_gpu_resource to store virgl specific members.
> - Move resource initialization from path "virtio-gpu: Resource UUID" here.
> - Remove error handling of g_new0, because glib will abort() on OOM.
> - Set iov and iov_cnt in struct virtio_gpu_simple_resource for all types
>   of resources.
>
>  hw/display/virtio-gpu-virgl.c | 84 ++++++++++++++++++++++++++---------
>  1 file changed, 64 insertions(+), 20 deletions(-)
>
> diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c
> index 5bbc8071b2..faab374336 100644
> --- a/hw/display/virtio-gpu-virgl.c
> +++ b/hw/display/virtio-gpu-virgl.c
> @@ -22,6 +22,23 @@
>
>  #include <virglrenderer.h>
>
> +struct virgl_gpu_resource {
> +    struct virtio_gpu_simple_resource res;
> +};
> +
> +static struct virgl_gpu_resource *
> +virgl_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id)
> +{
> +    struct virtio_gpu_simple_resource *res;
> +
> +    res = virtio_gpu_find_resource(g, resource_id);
> +    if (!res) {
> +        return NULL;
> +    }
> +
> +    return container_of(res, struct virgl_gpu_resource, res);
> +}
> +
>  #if VIRGL_RENDERER_CALLBACKS_VERSION >= 4
>  static void *
>  virgl_get_egl_display(G_GNUC_UNUSED void *cookie)
> @@ -35,11 +52,19 @@ static void virgl_cmd_create_resource_2d(VirtIOGPU *g,
>  {
>      struct virtio_gpu_resource_create_2d c2d;
>      struct virgl_renderer_resource_create_args args;
> +    struct virgl_gpu_resource *vres;
>
>      VIRTIO_GPU_FILL_CMD(c2d);
>      trace_virtio_gpu_cmd_res_create_2d(c2d.resource_id, c2d.format,
>                                         c2d.width, c2d.height);
>

It should check the resource doesn't already exist (similar to 2d code)

> +    vres = g_new0(struct virgl_gpu_resource, 1);
> +    vres->res.width = c2d.width;
> +    vres->res.height = c2d.height;
> +    vres->res.format = c2d.format;
> +    vres->res.resource_id = c2d.resource_id;
> +    QTAILQ_INSERT_HEAD(&g->reslist, &vres->res, next);
> +
>      args.handle = c2d.resource_id;
>      args.target = 2;
>      args.format = c2d.format;
> @@ -59,11 +84,19 @@ static void virgl_cmd_create_resource_3d(VirtIOGPU *g,
>  {
>      struct virtio_gpu_resource_create_3d c3d;
>      struct virgl_renderer_resource_create_args args;
> +    struct virgl_gpu_resource *vres;
>
>      VIRTIO_GPU_FILL_CMD(c3d);
>      trace_virtio_gpu_cmd_res_create_3d(c3d.resource_id, c3d.format,
>                                         c3d.width, c3d.height, c3d.depth);
>

same

> +    vres = g_new0(struct virgl_gpu_resource, 1);
> +    vres->res.width = c3d.width;
> +    vres->res.height = c3d.height;
> +    vres->res.format = c3d.format;
> +    vres->res.resource_id = c3d.resource_id;
> +    QTAILQ_INSERT_HEAD(&g->reslist, &vres->res, next);
> +
>      args.handle = c3d.resource_id;
>      args.target = c3d.target;
>      args.format = c3d.format;
> @@ -82,19 +115,23 @@ static void virgl_cmd_resource_unref(VirtIOGPU *g,
>                                       struct virtio_gpu_ctrl_command *cmd)
>  {
>      struct virtio_gpu_resource_unref unref;
> -    struct iovec *res_iovs = NULL;
> -    int num_iovs = 0;
> +    struct virgl_gpu_resource *vres;
>
>      VIRTIO_GPU_FILL_CMD(unref);
>      trace_virtio_gpu_cmd_res_unref(unref.resource_id);
>
> -    virgl_renderer_resource_detach_iov(unref.resource_id,
> -                                       &res_iovs,
> -                                       &num_iovs);
> -    if (res_iovs != NULL && num_iovs != 0) {
> -        virtio_gpu_cleanup_mapping_iov(g, res_iovs, num_iovs);
> +    vres = virgl_gpu_find_resource(g, unref.resource_id);
> +    if (!vres) {
> +        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> +        return;
>      }
> +
> +    virgl_renderer_resource_detach_iov(unref.resource_id, NULL, NULL);
>      virgl_renderer_resource_unref(unref.resource_id);
> +
> +    QTAILQ_REMOVE(&g->reslist, &vres->res, next);
> +    virtio_gpu_cleanup_mapping(g, &vres->res);
> +    g_free(vres);
>  }
>
>  static void virgl_cmd_context_create(VirtIOGPU *g,
> @@ -310,44 +347,51 @@ static void virgl_resource_attach_backing(VirtIOGPU *g,
>                                            struct virtio_gpu_ctrl_command 
> *cmd)
>  {
>      struct virtio_gpu_resource_attach_backing att_rb;
> -    struct iovec *res_iovs;
> -    uint32_t res_niov;
> +    struct virgl_gpu_resource *vres;
>      int ret;
>
>      VIRTIO_GPU_FILL_CMD(att_rb);
>      trace_virtio_gpu_cmd_res_back_attach(att_rb.resource_id);
>
> +    vres = virgl_gpu_find_resource(g, att_rb.resource_id);
> +    if (!vres) {
> +        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> +        return;
> +    }
> +
>      ret = virtio_gpu_create_mapping_iov(g, att_rb.nr_entries, sizeof(att_rb),
> -                                        cmd, NULL, &res_iovs, &res_niov);
> +                                        cmd, NULL, &vres->res.iov,
> +                                        &vres->res.iov_cnt);
>      if (ret != 0) {
>          cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
>          return;
>      }
>
>      ret = virgl_renderer_resource_attach_iov(att_rb.resource_id,
> -                                             res_iovs, res_niov);
> +                                             vres->res.iov, 
> vres->res.iov_cnt);
>
> -    if (ret != 0)
> -        virtio_gpu_cleanup_mapping_iov(g, res_iovs, res_niov);
> +    if (ret != 0) {
> +        virtio_gpu_cleanup_mapping(g, &vres->res);
> +    }
>  }
>
>  static void virgl_resource_detach_backing(VirtIOGPU *g,
>                                            struct virtio_gpu_ctrl_command 
> *cmd)
>  {
>      struct virtio_gpu_resource_detach_backing detach_rb;
> -    struct iovec *res_iovs = NULL;
> -    int num_iovs = 0;
> +    struct virgl_gpu_resource *vres;
>
>      VIRTIO_GPU_FILL_CMD(detach_rb);
>      trace_virtio_gpu_cmd_res_back_detach(detach_rb.resource_id);
>
> -    virgl_renderer_resource_detach_iov(detach_rb.resource_id,
> -                                       &res_iovs,
> -                                       &num_iovs);
> -    if (res_iovs == NULL || num_iovs == 0) {
> +    vres = virgl_gpu_find_resource(g, detach_rb.resource_id);
> +    if (!vres) {
> +        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
>          return;
>      }
> -    virtio_gpu_cleanup_mapping_iov(g, res_iovs, num_iovs);
> +
> +    virgl_renderer_resource_detach_iov(detach_rb.resource_id, NULL, NULL);
> +    virtio_gpu_cleanup_mapping(g, &vres->res);
>  }
>
>
> --
> 2.25.1
>
>


-- 
Marc-André Lureau